初中生物尽管不是中考必考科目,但是也是一门发挥重要作用的学科。生物教材中的概念、实验等理解起来有一定的难度,生物教师在教学时,如果能够根据教学内容的特点恰当地构建不同情形的导入情境,恰当的导入能在一定程度上激发学生的学习兴趣,有助于吸引学生的注意力,帮助学生明确学习目的,使得学生建立知识间的联系,有利于他们更积极主动地投入到新课的探究当中。所以,恰当巧妙且富有吸引力的导入能把学生的求知欲望点燃。那么,如何在实际教学中有效导入新课呢? Although junior high school biology is not the subject of examination, but it is also an important role in the discipline. Biological teaching materials in the concept of experiments to understand a certain degree of difficulty, biology teachers in teaching, if the teaching content can be properly constructed according to the characteristics of different situations into the situation, the appropriate import can to some extent to stimulate students interest in learning , Help to attract the attention of students, help students to clarify the purpose of learning, enabling students to establish the connection between knowledge, help them to be more proactive into the new lesson exploration. Therefore, the appropriate clever and attractive introduction can ignite the desire of students for curiosity. So, how to effectively introduce the new lesson in the actual teaching it?